Accurate and reproducible aeroelastic load calculations are indispensable for designing modern multi-MW wind turbines. They are also essential for assessing the load reduction capabilities of advanced wind turbine control strategies. In this paper, we contribute to this topic by introducing the TUB Controller, an advanced open-source wind turbine c...
This review paper presents an overview of Vortex Methods for flow simulation and their different sub-approaches, from their creation to the present. Particle methods distinguish themselves by their intuitive and natural description of the fluid flow as well as their low numerical dissipation and their stability. Vortex methods belong to Lagrangian ...
Wind turbines are large and complex machines which operate in a highly unsteady environment. Due to the spatially and temporally stochastic nature of the wind resource, a large amount of simulation data is needed when one wants to assess the lifetime of such a machine. Both extreme events, such as storms, strong gusts or significant wind direction ...
Published in Computational Mathematics and Mathematical Physics
AbstractBoundary layer theory is used to show that, at large Reynolds numbers, the three-dimensional Navier–Stokes equations can be rewritten in a form with diffusion velocity that was previously known for the cases of two-dimensional and axisymmetric flows. Relying on this hypothesis, a closed system of equations that is a development of a similar...
Published in Fluid Dynamics
When simulating incompressible flow around airfoil using vortex methods of computational hydrodynamics, it is necessary to solve the boundary integral equation with respect to the intensity of the vortex sheet at the airfoil surface line. For its approximate solution, the Galerkin method with a piecewise-constant and piecewise-linear representation...
Published in Lobachevskii Journal of Mathematics
In this article authors analyse the specifics of parallel implementation of numericalmethods based on integral equations. The necessity to create original parallel subroutines implementing fast matrix algorithms for efficient work with big dense matrices is stressed out. Specifics of parallel algorithms and calculating capabilities of integral equa...
Published in Russian Aeronautics
A mathematical model and numerical scheme of the method being used are described. The results of calculating the helicopter main rotor aerodynamic performance in hover mode above a helideck are compared to the known wind tunnel test data.
In this work, a passive flow control study is proposed in order to regularize the flow dynamics around a hemisphere at a low and a higher Reynolds number in the wake transition regime. This passive control is realized by covering the projected curved surface of the hemisphere with a porous coating. The presence of such porous medium modifies the bo...
A vortex method with penalization is proposed in order to simulate three-dimensional incompressible bluff body flows. This approach combines the robustness of vortex methods and the flexibility of penalization methods to impose boundary conditions on the obstacle. Far field boundary conditions are handled in a FFT-based Poisson solver. A validation...
Although some of the earliest work in fluid simulation for computer graphics exploited vorticity (e.g. Yaeger et al.'s work on Jupiter for the film 2010 [4]), by and large practical work over the last decade or two has focused on velocity-pressure formulations. This talk looks at why vortex methods are worth coming back to, the troubles that have s...
